3 
46 ‘* ENDEAVOUR ” SCIENTIFIC RESULTS. 
occupied by about ten similar plates ; these plates are more 
quadrilateral than the abactinal plates and differ in being less 
swollen, much more completely covered with granules and in 
having the central granule replaced by a more or less con- 
spicuous spine, 1-5 mm. long, 1-2 mm. in diameter, and 
bluntly pointed, clavate or chisel-shaped at tip ; these spines 
are smallest near the inferomarginals and largest near the 
adoral adambulacrals ; the granules are coarser than on the 
abactinal surface and there is less distinction between 
‘“ crowning ” and ‘“‘ marginal ”’ granules; many granules are 
replaced by the large, characteristic pedicellariz. _Adambu- 
lacrals about 55, wider than long or squarish, quite similar to 
the actinolaterals in having marginal granules on the adoral, 
outer and aboral sides, a group or series of somewhat coarser 
granules on the outer end and a large spine ator near the centre ; 
these spines may exceed 5 mm. in length; on the first two 
plates (near mouth) and occasionally elsewhere, a second 
spine, similar but much smaller, stands just behind the large 
one; on the furrow margin of the plate is a series of 7-8 
crowded, compressed, blunt spines of which the four or five 
middle ones are sub-equal, about 2 mm. long, while the aboral, 
and the adoral (1 or 2) are markedly shorter and more pointed ; 
on the adoral, marginal corner of the plate is a very large 
pedicellaria, of the same type as those elsewhere, but with 
jaws of very different shape, 1.5-2 mm. long, slenderly spatu- 
late and slightly asymmetrical, bluntly pointed. Oral plates 
not particularly large or prominent ; each has 7 or 8 large, 
furrow spines, the proximal ones very large and prismatic ; 
each plate bears on its surface two large spines like those on 
the adjoining adambulacral plates. Colour (dry), pale yel- 
lowish-brown. 
This is the most notable and the best characterised of all 
the ‘‘ Endeavour’s’’ Starfishes, not previously known to 
science. The adambulacral armature with big pedicellarize 
and the spiny actinal interradial areas distinguish it at once 
from any other member of the genus, although it seems to be 
nearest the Philippine species C. corynetes, since it has pedi- 
cellariz like those of that species, spines on the actinal plates 
and an adambulacral armature of the same type. It is readily 
distinguished from C. corynetes, however, by the absence of 
spines on the terminal plate and by the granulose abactinal 
plates. The diagnosis of Calliaster as given by Fisher! will 
require considerable modification to admit this fine new 
species from Australia (and the Philippine form, too), for 
1. Fisher—Bull. U.S. Nat. Mus., Ixxvi., 1911, p. 171. 
